Enable --verbose for android_plugin_skip_unsupported_test tests (#158933)

Hoping this will give some more insights into https://github.com/flutter/flutter/issues/157640

packages/flutter_tools/test/integration.shard/android_plugin_skip_unsupported_test.dart

@@ -97,6 +97,8 @@ void main() {
       'build',
       'apk',
       '--debug',
+      // TODO(bkonyi): remove once https://github.com/flutter/flutter/pull/158933 is resolved
+      '--verbose',
     ], workingDirectory: pluginExampleAppDir.path);
   }